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1. 发明授权

US06619848B2 Ceramic dynamic pressure bearing, motor with bearing, hard disc apparatus and polygon scanner 有权
公开(公告)号：US06619848B2
公开(公告)日：2003-09-16
申请号：US10073298
申请日：2002-02-13
申请人： Hironobu Ishikawa , Tetsuji Yogo , Takayoshi Morishita
发明人： Hironobu Ishikawa , Tetsuji Yogo , Takayoshi Morishita
IPC分类号： F16C3206
CPC分类号： F16C33/107 , F16C17/107 , F16C17/26 , F16C33/043
摘要： A ceramic dynamic pressure bearing comprising a first member and a second member, wherein the first member and the second member define a dynamic pressure gap therebetween, the first member and the second member relatively rotate around an axis of rotation, the relative rotation generates a fluid dynamic pressure in the dynamic pressure gap, the first member has a first surface directing to the dynamic pressure gap and the second member has a second surface directing to the dynamic pressure gap, and at least one of the first and second surfaces comprises ceramic, the ceramic comprises: a ceramic matrix that is selected from alumina ceramic, zirconia ceramic and silicon nitride ceramic; and 15 vol % to 70 vol % of an electrically-conductive inorganic compound phase based on the total amount of the ceramic, the phase is dispersed in the ceramic matrix, the phase comprises at least one compound selected from tungsten carbide, silicon carbide, conductive oxide, metallic nitride, metallic carbide, metallic boride, and metallic carbon nitride, and the metallic nitride, the metallic carbide, the metallic boride, and the metallic carbon nitride each independently comprises at least one of Hf, Mo, Ti, Zr, Nb, and Ta.

2. 发明授权

US5916833A Sintered ceramic bodies and ceramic metal working tools 失效
标题翻译：烧结陶瓷体和陶瓷金属加工工具
公开(公告)号：US5916833A
公开(公告)日：1999-06-29
申请号：US744861
申请日：1996-11-06
申请人： Keiji Suzuki , Takayoshi Morishita , Tetsuji Yogo
发明人： Keiji Suzuki , Takayoshi Morishita , Tetsuji Yogo
IPC分类号： B23H9/00 , C04B35/119 , C04B35/488 , C04B35/56 , C04B35/58 , H01B1/14 , H01B1/18 , C04B35/101
CPC分类号： C04B35/565 , B23H9/00 , C04B35/119 , C04B35/488 , C04B35/5607 , C04B35/5611 , C04B35/5626 , C04B35/58014 , C04B35/58021 , C04B35/58028 , C04B35/58071 , C04B35/5935 , C04B35/645 , C04B35/6455 , H01B1/14 , H01B1/18
摘要： A sintered ceramic body which can be worked by electrical discharge machining, has high mechanical strength, and can be worked into sintered ceramic tools which have long life is disclosed. Further, sintered ceramic tools which have long life and scarcely cause flaws in work pieces are provided. The sintered ceramic body comprises ceramic particles having specific particle diameter and particle distribution.
摘要翻译：可以通过放电加工加工的烧结陶瓷体，具有高的机械强度，并且可以加工成具有长寿命的烧结陶瓷工具。此外，提供了寿命长且几乎不引起工件缺陷的烧结陶瓷工具。烧结陶瓷体包括具有特定粒径和粒子分布的陶瓷颗粒。

3. 发明授权

US5994250A Sintered ceramic bodies and ceramic working tools 失效
标题翻译：烧结陶瓷体和陶瓷工作工具
公开(公告)号：US5994250A
公开(公告)日：1999-11-30
申请号：US112456
申请日：1998-07-09
申请人： Keiji Suzuki , Takayoshi Morishita , Tetsuji Yogo
发明人： Keiji Suzuki , Takayoshi Morishita , Tetsuji Yogo
IPC分类号： B23H9/00 , C04B35/119 , C04B35/488 , C04B35/56 , C04B35/58 , H01B1/14 , H01B1/18 , B28B1/00 , C04B35/101
CPC分类号： C04B35/565 , B23H9/00 , C04B35/119 , C04B35/488 , C04B35/5607 , C04B35/5611 , C04B35/5626 , C04B35/58014 , C04B35/58021 , C04B35/58028 , C04B35/58071 , C04B35/5935 , C04B35/645 , C04B35/6455 , H01B1/14 , H01B1/18
摘要： A sintered ceramic body which can be worked by electrical discharge machining, has high mechanical strength, and can be worked into sintered ceramic tools which have long life is disclosed. Further, sintered ceramic tools which have long life and scarcely cause flaws in work pieces are provided. The sintered ceramic body comprises ceramic particles having specific particle diameter and particle distribution.
摘要翻译：可以通过放电加工加工的烧结陶瓷体，具有高的机械强度，并且可以加工成具有长寿命的烧结陶瓷工具。此外，提供了寿命长且几乎不引起工件缺陷的烧结陶瓷工具。烧结陶瓷体包括具有特定粒径和粒子分布的陶瓷颗粒。

4. 发明授权

US06619847B1 Ceramic dynamic-pressure bearing, motor having bearing, hard disk drive, and polygon scanner 有权
标题翻译：陶瓷动压轴承，带轴承的电机，硬盘驱动器和多边形扫描仪
公开(公告)号：US06619847B1
公开(公告)日：2003-09-16
申请号：US10073146
申请日：2002-02-13
申请人： Hironobu Ishikawa , Tetsuji Yogo
发明人： Hironobu Ishikawa , Tetsuji Yogo
IPC分类号： F16C3206
CPC分类号： F16C33/043 , F16C17/10 , F16C17/107 , F16C17/26 , F16C2370/12 , H02K5/163 , H02K5/165
摘要： A ceramic dynamic-pressure bearing which is not prone to wear or a like problem associated with starting, stopping, or a like operation mode and which can realize smooth rotation. A dynamic-pressure gap 17 is formed between a first member 14 and a second member 15, which undergo relative rotation about a predetermined axis of rotation. The relative rotation of the first member 14 and the second member 15 generate fluid dynamic-pressure in the dynamic-pressure gap 17. At least a portion of one or both of the first member 14 and the second member 15 includes a polished surface (a dynamic-pressure gap definition surface) formed of alumina ceramic facing the dynamic-pressure gap 17, and the alumina ceramic, which forms the dynamic-pressure gap definition surface finished by polishing, is adjusted to have an apparent density of 3.5-3.9 g/cm3. Also disclosed is a motor, hard disk drive and polygon scanner containing the bearing.
摘要翻译：不易磨损的陶瓷动压轴承或与起动，停止等相似的操作模式相关的问题，能够实现平稳的旋转。在第一构件14和第二构件15之间形成动态压力间隙17，第二构件15经历相对于预定旋转轴线的相对旋转。第一构件14和第二构件15的相对旋转在动压力间隙17中产生流体动压。第一构件14和第二构件15中的一个或两个的至少一部分包括抛光表面（a 由形成动态压力间隙17的氧化铝陶瓷形成的动态压力间隙定义表面，并且通过抛光将形成动态压力间隙定义表面的氧化铝陶瓷调整为具有3.5-3.9g / cm3。还公开了一种包含轴承的马达，硬盘驱动器和多边形扫描仪。

5. 发明授权

US06659647B2 Ceramic dynamic pressure bearing, motor with bearing, hard disk device, and polygon scanner 有权
公开(公告)号：US06659647B2
公开(公告)日：2003-12-09
申请号：US10091022
申请日：2002-03-06
申请人： Atsutoshi Sugiyama , Hironobu Ishikawa , Tetsuji Yogo
发明人： Atsutoshi Sugiyama , Hironobu Ishikawa , Tetsuji Yogo
IPC分类号： F16C1702
CPC分类号： C04B35/6303 , C04B35/111 , C04B2235/3201 , C04B2235/3205 , C04B2235/3206 , C04B2235/3217 , C04B2235/3229 , C04B2235/3418 , C04B2235/5436 , C04B2235/72 , C04B2235/77 , C04B2235/786 , C04B2235/94 , C04B2235/96 , C04B2235/963 , F16C17/107 , F16C17/26 , F16C33/043 , F16C33/107 , F16C2370/12 , G02B26/121 , G11B19/2009 , H02K5/1675 , H02K5/1677 , Y10S384/902 , Y10S384/913
摘要： A ceramic dynamic pressure bearing, includes: a first member having an outer periphery formed with a gap forming surface causing a radial dynamic pressure, and a second member having an inner periphery defining a through hole formed with a gap forming surface causing the radial dynamic pressure. The first member is inserted into the through hole as to form a radial gap. The first member and the second member make rotation relative to each other to cause a fluid dynamic pressure at the radial gap. The first member and the second member are composed of an alumina ceramic including: an aluminum 90% to 99.5% by weight, and an oxide sintering assistant 0.5% to 10% by weight. The outer periphery has cylindricity not larger than 1.0 &mgr;m, and roundness not larger than 0.5 &mgr;m. The inner periphery has cylindricity not larger than 1.5 &mgr;m, and roundness not larger than 1.0 &mgr;m.

6. 发明授权

US06702466B2 Ceramic dynamic-pressure bearing, motor having bearing, hard disk drive, polygon scanner, and method for manufacturing ceramic dynamic-pressure bearing 有权
标题翻译：陶瓷动压轴承，带轴承的电机，硬盘驱动器，多边形扫描仪，陶瓷动压轴承制造方法
公开(公告)号：US06702466B2
公开(公告)日：2004-03-09
申请号：US10123160
申请日：2002-04-17
申请人： Hironobu Ishikawa , Tetsuji Yogo , Junya Moribe
发明人： Hironobu Ishikawa , Tetsuji Yogo , Junya Moribe
IPC分类号： F16C3206
CPC分类号： H02K5/1675 , F16C17/026 , F16C17/045 , F16C17/107 , F16C33/043 , F16C33/107 , F16C2370/12 , F16C2370/22 , H02K5/1677
摘要： A ceramic dynamic-pressure bearing having dynamic-pressure grooves. At least a portion including a surface (dynamic-pressure gap definition surface) facing a dynamic-pressure gap is formed of ceramic, and dynamic-pressure grooves GV are formed, by electrolytic etching, on the ceramic dynamic-pressure gap definition surface such that, on a cross section of the groove GV taken perpendicular to the longitudinal direction of the groove GV, a curvature portion R having a radius of 3-7 &mgr;m is formed at a meeting position where a groove sidewall surface SG and a groove bottom surface BG meet. In a preferred embodiment, a large number of pores K are formed on one or more of the rotary surfaces M of the dynamic-pressure bearing formed of ceramic such that the surface porosity falls in the range of 10 to 60%.
摘要翻译：具有动压槽的陶瓷动压轴承。至少一部分包括面对动压力间隙的表面（动压间隙限定表面）由陶瓷形成，动压槽GV通过电解蚀刻形成在陶瓷动压间隙定义表面上，使得在垂直于槽GV的纵向的槽GV的横截面上形成半径3-7μm的曲率部分R，其中槽侧壁面SG和槽底面BG 遇到。在一个优选实施例中，在由陶瓷形成的动压轴承的一个或多个旋转表面M上形成大量孔K，使得表面孔隙率在10至60％的范围内。

7. 发明授权

US5600867A Car kiln wheel having silicon nitride rotating members 失效
标题翻译：汽车窑轮具有氮化硅旋转构件
公开(公告)号：US5600867A
公开(公告)日：1997-02-11
申请号：US299416
申请日：1994-09-01
申请人： Tomonori Niwa , Tetsuji Yogo
发明人： Tomonori Niwa , Tetsuji Yogo
IPC分类号： B60B37/10 , F16C33/30 , A47B91/00 , B60B33/00
CPC分类号： B60B37/10 , F16C33/30 , Y10T16/184
摘要： A bearing type wheel for a car which rollers through a car tunnel kiln, includes a plurality of rotating members such as rollers or balls interposed between respective inner rings and an outer ring. Each of the rotating members consists essentially of a sintered body of silicon nitride base (Si.sub.3 N.sub.4) ceramic.
摘要翻译：一种用于汽车的轴承型轮，其通过汽车隧道窑的辊子包括多个旋转构件，例如介于相应的内圈和外圈之间的滚子或滚珠。每个旋转构件基本上由氮化硅基底（Si 3 N 4）陶瓷的烧结体组成。

8. 发明授权

US06696376B2 Zirconia containing ceramic ball, method for manufacturing same, ceramic ball bearing and check valve 有权
标题翻译：含氧化锆陶瓷球，制造方法，陶瓷球轴承和止回阀
公开(公告)号：US06696376B2
公开(公告)日：2004-02-24
申请号：US09829594
申请日：2001-04-10
申请人： Tomonori Niwa , Tetsuji Yogo
发明人： Tomonori Niwa , Tetsuji Yogo
IPC分类号： C04B3548
CPC分类号： C04B35/48 , C04B35/49 , F16C33/32 , F16C2240/54
摘要： A zirconia containing ceramic ball is formed of a zirconia containing ceramic material which contains in an amount of not less than 10% by volume the zirconia ceramic phase composed predominantly of zirconium oxide. The size of the largest pore among pores present in a region extending radially from the surface of the ball to a depth of 50 &mgr;m as observed on a polished cross section of the ball taken substantially across the center of the ball is not greater than 3 &mgr;m. The ceramic ball can be manufactured through firing a green body whose relative density is enhanced to not lower than 61% by use of rolling granulation.
摘要翻译：含氧化锆的陶瓷球由含氧化锆的陶瓷材料形成，其含有不少于10体积％的主要由氧化锆组成的氧化锆陶瓷相。在基本上穿过球的中心拍摄的球的抛光横截面上观察到，在从球的表面径向延伸到50μm的深度的区域中存在的孔中的最大孔的尺寸不大于3μm 。可以通过使用轧制造粒将相对密度提高到不低于61％的生坯来制造陶瓷球。

9. 发明授权

US06464906B1 Method of manufacturing spherical bodies by rotation, spherical bodies made by the method and a powder composition for use in the method 有权
标题翻译：通过旋转制造球形体的方法，通过该方法制造的球形体和用于该方法的粉末组合物
公开(公告)号：US06464906B1
公开(公告)日：2002-10-15
申请号：US09417208
申请日：1999-10-13
申请人： Tomonori Niwa , Tetsuji Yogo
发明人： Tomonori Niwa , Tetsuji Yogo
IPC分类号： B29B900
CPC分类号： C04B35/593 , B01J2/12 , B01J2/14 , B01J2/16 , C01B21/0687 , C01P2004/03 , C01P2004/32 , C01P2004/61 , C01P2004/62 , C01P2006/12 , C04B35/5935 , F16C33/32 , F16C2206/60 , F16C2220/20 , F16C2240/48
摘要： A method of making spherical bodies from powder, which comprises (1) preparing an adjusted powder so as to have at least one powder characteristic selected from the group consisting of an average particle size, a powder particle size distribution and a BET specific surface area, (2) preparing nuclei having a particle size larger than that of the adjusted powder, (3) rotating the nuclei, and (4) adding the adjusted powder and a solvent to the rotating nuclei so that particles of the adjusted powder accumulate on the nuclei to form granular bodies. Also disclosed is a spherical body having a core or nucleus formed in the spherical body, an adjusted powder composition for forming a spherical body, and a method for manufacturing spherical sintered bodies of silicon nitride.
摘要翻译：一种从粉末制造球形体的方法，其包括（1）制备调整后的粉末以具有选自平均粒径，粉末粒度分布和BET比表面积的至少一种粉末特性，（2）制备粒径大于调整粉末粒径的核，（3）旋转核，（4）将调整后的粉末和溶剂加入旋转核，使调整粉末的颗粒聚集在核上以形成粒状体。还公开了一种在球体中形成有芯或核的球体，用于形成球体的经调整的粉末组合物，以及制造氮化硅球形烧结体的方法。

10. 发明授权

US5106550A Method of producing ceramic rotor 失效
标题翻译：生产陶瓷转子的方法
公开(公告)号：US5106550A
公开(公告)日：1992-04-21
申请号：US192434
申请日：1988-05-11
申请人： Tetsuji Yogo , Yoshinori Hattori , Motohide Ando , Yasushi Katano
发明人： Tetsuji Yogo , Yoshinori Hattori , Motohide Ando , Yasushi Katano
IPC分类号： F01D5/04 , C04B37/00 , F04D29/28
CPC分类号： C04B37/001 , C04B35/584 , C04B35/645 , C04B2235/6562 , C04B2235/658 , C04B2237/32 , C04B2237/343 , C04B2237/36 , C04B2237/368 , C04B2237/568
摘要： A ceramic rotor is constituted by a shaft portion and a disk portion. The shaft portion and the disk portion are joined to constitute a single body by sintering. The shaft portion and the disk portion are so formed that the amount of contraction of the shaft portion at the time of sintering is larger by 0.1% to 3% than that of the disk portion such that compresson stress is induced in the disk portion.
摘要翻译：陶瓷转子由轴部和盘部构成。轴部和盘部通过烧结连接构成一体。轴部和盘部形成为使得烧结时的轴部的收缩量比盘部分的收缩量大0.1％〜3％，从而在盘部中产生压缩应力。

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